package code.dailyCode;

import java.util.Arrays;
import java.util.TreeSet;

public class AdvantageCount {
    public static void main(String[] args) {
        TreeSet<Integer> set = new TreeSet<>();
        for (int i = 0; i < 10; i++) {
            set.add(i*3);
        }
        System.out.println(set.ceiling(-1));
    }
}
